Expression (Qute - Core 2.9.2.Final API)

```
public interface Expression
```
Represents a value expression. It could be a literal such as 'foo'. It could have a namespace such as data for data:name. It could have several parts such as item and name for item.name.

See Also:

Evaluator

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static interface Expression.Part

static interface Expression.VirtualMethodPart
Part that represents a virtual method.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`CompletionStage<Object>`	`asLiteral()`
`default String`	`collectTypeInfo()`
`int`	`getGeneratedId()`	The id must be unique for the template.
`Object`	`getLiteral()`
`CompletableFuture<Object>`	`getLiteralValue()`
`String`	`getNamespace()`
`TemplateNode.Origin`	`getOrigin()`
`List<Expression.Part>`	`getParts()`
`default boolean`	`hasNamespace()`
`default boolean`	`hasTypeInfo()`
`boolean`	`isLiteral()`
`String`	`toOriginalString()`

- Method Detail
  - getNamespace
```
String getNamespace()
```
    Returns:
    
    the namespace, may be null
    
    See Also:
    
    NamespaceResolver
  - hasNamespace
```
default boolean hasNamespace()
```
  - getParts
```
List<Expression.Part> getParts()
```
    Returns:
    
    the list of parts, is never null
  - isLiteral
```
boolean isLiteral()
```
    Returns:
    
    true if it represents a literal
  - getLiteralValue
```
CompletableFuture<Object> getLiteralValue()
```
    Returns:
    
    the literal value, or null
  - getLiteral
```
Object getLiteral()
```
    Returns:
    
    the literal value, or null
  - asLiteral
```
CompletionStage<Object> asLiteral()
```
    Returns:
    
    the literal value
    
    Throws:
    
    IllegalStateException - If the expression does not represent a literal
    
    See Also:
    
    isLiteral()
  - getOrigin
```
TemplateNode.Origin getOrigin()
```
    Returns:
    
    the origin
  - toOriginalString
```
String toOriginalString()
```
    Returns:
    
    the original value as defined in the template
  - collectTypeInfo
```
default String collectTypeInfo()
```
  - hasTypeInfo
```
default boolean hasTypeInfo()
```
  - getGeneratedId
```
int getGeneratedId()
```
    The id must be unique for the template.
    
    Returns:
    
    the generated id or -1 for an expression that was not created by a parser